Name: NF NC21FeDU Bolt
Material: BSW NA16
Standard: NF, BSW, DIN, ASTM
Size: M42-3
Length: 430 mm
Hardness: Max. 200 HB
Feature: Good Resistance to Stress Corrosion Cracking
Application: For Industrial areas where the temperature does not exceed 550 degrees Celsius
Source: https://www.valvegasketboltnuts.com/nf-nc21fedu-bolt-bsw-na16-m42-3-430-mm-max-200-hb.html
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